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2 Sheets-'-Sheet 2. J; E. WILSON. STEAM BOILER.

Patented Sept. 3, 1889.

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UNITED STAT S PATENT OFFICE.

JAMES E. WILSON, OF EASTON, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO FRANKWILSON, OF SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 410,227, datedSeptember 3, 1889.

Application filed July 3, 1889. Serial No. 316,425. (No model.)

To all whom it may concern.-

Be it known that I, JAMES E. WlLsoN, a citizen of the United States, anda resident of the city of Easton, in the county of Northampton, in theState of Pennsylvania, have invented a new and useful Steam-Boiler, ofwhich the following is a description.

The object of the invention is to provide a boiler which shall utilizeto the greatest possible extent the heat produced through combustion offuel; and to this end the boiler is so constructed as to expose to theimpact of the heat-currents a surface the extent of which, in proportionto the space inclosed within the boiler, is very great, and which is ofsuch proportions that no point in the interior of the boiler is remotefrom the volume of escaping products of .combustion.

The construction thus generally indicated involves certain novelcombinations, as will appear from the following detailed description.

In the accompanying drawings, Figure 1 represents a perspectiveelevation, portions being broken out of the casing to exhibit theinterior construction. Fig. 2 is a vertical longitudinal central sectionfrom front to rear. Fig. 3 is a vertical transverse central section, theline being indicated at to win Fig. 2. Fig. 4 is a horizontal sectionlooking in the direction of the arrow in the line 00min Figs. 2 and 3.Fig. 5 is a perspective elevation of the boiler detached from itscasing. Fig. 6 is a view in perspective of the metallic coveringplate.

A designates the boiler or steam-generator as a whole, A being the wallor casing composed of brick masonry, in which the boiler or generatorproper B is detachably received. The casing A is mounted upon a base aof soapstone, fire-brick, or other fire-proof material, and it isprovided in its front wall with a fuel-supply opening a and with anash-pit opening a.

In a plane between the openings a. and a, and extending across theinterior of the casing, is mounted a grate or a series of gratebars a ofany suitable construction. In its interior surface the casing A isprovided with a front vertical recessed way a and a rear verticalrecessed way a, which extend from the top of the wall downwardly andrespectively terminate at bottom in a shoulder a and a At its upperextremity the casing is closed by a covering-plate a which, by

preference, is provided along its edges with a continuousdownwardly-extending flange aflwithin which the masonry of the casing isreceived. This covering-plate is provided with an opening at, having acollar a for exit of products of combustion and to receive aconducting-pipe for such products, and it has also an opening a for asteamdischarge pipe.

The boiler or generator B consists in its lower and main portion ofanarrowrectangw lar central vertically-placed chamber 12, a successionof horizontal groups or series of inwardlyopen and outwardly-closedwatertubes 1), extending outward from the cham- 6 and a correspondinghorizontal water-return tube b.

The horizontal water-tubes b b have a staggered or alternatingarrangement from bottom to top, as shown, so as to cause the products ofcombustion in their upward pas- 8o sage to take a zigzag course, andthey are of such longitudinal extent that the outer end of each tube isbrought into contact or very nearly in contact with the wall of thecasing.

The Water-receiving central chamber 1) ex- 8 5 tends vertically upwardfrom. a point in a plane with the upper extremity of the fuelsupplyopening a and the, fuel-chamber O to a point in the upper portion of thecombustion-chamber O, and it extends from the front 0 to the rear wallof such combustion-chamber, dividing the main portion thereof into twoequal parts. In its top plate I) the chamber 1) receives vertical tubes6 b which open into and serve as supports for a horizontallyplacedcylindrical steam-drum or superheating-chamber B, which at its top isprovided with a vertical steam-discharge pipe b which extends throughthe opening a, provided therefor in the covering-plate a of the cas- Iooing A.

At a distance above its lower extremity, corresponding with the distanceof the shoulders or bearings a and a of the casing above the upperextremity of the fuel-opening a, the central chamber 1) is provided witha front supporting or engaging bracket 13 and with a rear supportingbracket or lug B which are adapted to the grooves or ways a and a, andto the bearings or shoulders a and a It will be noted that through theprovision of the ways a a and the lugs B B it is made practicable toinsert or to remove and to support within the combustion-chamber O aboiler which practically extends over the entire horizontal area of suchchamber.

Undersome circumstances it may be desirable to employ instead of themetallic covering-plate a a covering of brick or of steatite, havingsuitable openings for smoke and steam exit 5 but in such cases thecovering will still be made detachable, either as an integer or injointed sections, so that-the boiler or generator may be readily removedand repaired, or a new one inserted whenever it is found desirable.

The apparatus thus constructed may be employed either for power, fordomestic steamheating, or for heating by a circulation of hot water.

Through the division of the combustionchamber by the central chamber 1)it will be practicable to use one-half only of the heating capacity ofthe structure, the draft being by an an gle-plate or other simple meansreadilycut olf from either half of the combustionchamber.

The drawings represent eleven series of water-tubes, at either side ofthe central chamber, each tube being threaded and screwed into a tappedopening in the chamber. I do not, however, restrict myself to thisnumber, although I have found a large number neces sary to thoroughutilization of the heat.

In the chamber 1) are suitable openings 0 0 for the removal ofaccumulations of sediment, and these are provided with closingappliances of any suitable kind.

Having described in invention, 1 claim- 1. The combination, with thecasing A, of the detachable covering-plate a having exitopening for theproducts of combustion, and the pendent vertically-detachable boiler B,having central vertical imperforate interiorlyunobstructeddividing-chamber 1), extending from front to rear of thecombustion-chamber, and provided with the series of right and lefthorizontal water-tubes b and b extending to the walls of suchcombustionchamber, whereby the interior space is divided centrally intotwo vertical right and left upwardly discharging chambers.

2. The combination, with the casing A, and with its detachablecovering-plate, provided with smoke-exit opening, of the pendentupwardly-detachable boiler B, having central rectangular elosely-fitting chamber 19, extending from the front to rear of the interior space anddividing the same into two separate right and left chambers, whichdischarge upwardly, and provided with horizontal water-tubes b and bextending from the central chamber across the separated parts of thecombustion-space, the supply-pipe 6 extending through the casing at oneside thereof, and the return-pipe b extending through the casing at theopposite side thereof.

3. The combination, with the casin g A, having vertical ways in thefront and rear walls thereof, extending from the top of the walldownwardlyand terminating in seats a and d of the boiler B, havingprojecting lugs B and B adapted to the vertical ways and to the seats aand a 4. The pendent upwardly-detachable steamgenerator B, havingcentral imperforate dividing-chamber I), right and left outwardlyclosedhorizontal water-tubes b and b and superposed superheating-chamber orsteamdrum B, in'combination with the inclosingcasing A, thecombustion-chamber of which is of like horizontal area with the boilerand its tubes, and with the detachable covering plate or cap a of suchcasing.

5. In a steam-boiler, the combination, with an inclosing-casing which isprovided with a detachable covering-plate and with support ing bearingsor seats, of a boiler which is provided with projecting lugs whichengage the supporting-bearings in the casing, whereby the boiler in itsentirety is rendered vertically removable and replaceable.

JAMES E. XVILSON.

WVitnesses:

J. MARsHALL YOUNG, J ACOB WILsoN.

